{知乎，让每一次点击都充满意义 —— 欢迎来到知乎，发现问题背后的世界。gap - a difference (In particular an regrettable difference) between two opinions or two views or two scenariosIncrease to term record Increase to term listing A2 [ C or U ] the best way by which two or even more items which you happen to be compar